This webinar recoring is made up of the following two presentation: POwdery Mildew of Tomatoes and Curly Top Disease of Tomato.
Powdery Mildew of Tomatoes
This presentation will help viewers in arid tomato production areas of the U.S. to recognize and manage powdery mildew of tomato caused by Leveillula. The presentation addresses disease symptoms, identification, life cycle, and host range of the fungus. The impacts of mildew on fruit yield and quality are presented and management strategies are discussed. Although cultural methods can impact the disease and will be mentioned, emphasis will be on chemical tools for disease management. Fungicide resistance management strategies will also be covered. The information presented should allow the practitioner to improve management of this disease.
Curly Top Disease of Tomato
Curly top disease, caused by viruses in the genus, Curtovirus, has impacted western US agriculture for over a century, and is a significant threat to tomato production. The two most abundant curtovirus species today are Beet severe curly top virus (BSCTV) and Beet mild curly top virus (BMCTV) but other species exist as well. This presentation discusses the viruses that cause curly top disease, including biology, vector transmission, epidemiology, and management. The presentation is designed to provide knowledge of curly top to growers, industry, and others interested in management of virus diseases affecting tomato production.
CCA/CPAg: 0.5 Integrated Pest Management
CPSS/CPSC: 0.5 Professional Meeting
Brenna Aegerter, PhD
University of California Cooperative Extension Program
Brenna Aegerter is a PhD level farm advisor for the University of California's cooperative extension program. She serves San Joaquin County, California.
William M. Wintermantel
In September 1998, Dr. Wintermantel joined the USDA-ARS as a Research Plant Pathologist with the USDA-ARS in Salinas, CA. Since 2001 he has been project leader for the virology research program in Salinas. Dr. Wintermantel's research focuses on virus epidemiology, disease etiology, vector transmission, molecular and biological characterization of plant viruses affecting vegetable crops and sugarbeets, and virus-vector-host interactions. Specific research interests include biological and molecular characterization of criniviruses, and crinivirus vector specificity and virus interactions. He has been working with crinivirus diseases of vegetables for the past 8 years, and has ongoing projects on factors influencing transmission of tomato criniviruses by different whitefly species, and virus-vector interactions determining the ability of different vector species to transmit these viruses. Recent studies are examining the epidemiology, host range and management of CYSDV, a recently emerged crinivirus affecting melons in the southwestern US and now Florida. Additional research is examining epidemiology of Beet curly top virus and related curtovirus species throughout the western U.S., including determination of factors influencing species/strain emergence, and development of biotechnology based resistance to this virus. Collaborative studies are also in progress on viral diseases of lettuce; on development of new sources of resistance to lettuce big vein disease and identification of sources of resistance to tospoviruses in lettuce. Finally, Dr. Wintermantel is involved in a project to determine protein interactions between sugarbeet and Beet necrotic yellow vein virus, the causal agent of rhizomania disease of sugarbeet, and development of methods to utilize this information for control of rhizomania.
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November 01, 2015